Research on the Accurate Measurement Method of Athletes’ Physical Consumption Using Intelligent Wearable Devices in Table Tennis Training

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The basic information is associated with the school standard met

Correlation	Age	Height	Weight	BMI	Body fat rate
Pearson correlation	-0.165**	0.032**	-0.029	0.0054	-0.292**

The basic information is associated with the eem

Correlation	Age	Height	Weight	BMI	Body fat rate
Pearson correlation	-0.037	0.345**	0.3625**	0.278**	-0.278**

Correlation and matching t test results

Equation	Correlation r	Predictive value/calibration value	t	Pair t check (p)
Equation 1(EEm)	0.937**	(6.09±1.94)/(6.17±2.02)	-1.808	0.075
Equation 2(MET)	0.876**	(5.91±1.58)/(6.03±1.71)	-1.833	0.069

The accelerometer vm value is associated with the met value

Correlation	VM
	Wrist	Elbow	Shoulder	Handle	Thorax	Iliac crest	Thigh	Ankle
Pearson correlation	0.576**	0.638**	0.621**	0.483**	0.647**	0.675**	0.668**	0.472**

A list of predicted and measured values

GT3X wearing parts	Free singles		Phase integration
	GTSX	K4b2	GTSX	K4b2
Waist	7.2±2.1	10.7±1.7	6.8±1.6	10.5+1.6
Thigh	7.4±1.6		7.7±1.4
Ankle joint	8.3±1.5		8.6±1.5
Wrist	23.7±7.5		21.5±6.9
Handle	32.8±8.9		28.4±7.6

The Actigrap count value is associated with the EEm

Pearson correlation	Wrist	Elbow	Shoulder	Handle	Thorax	Iliac crest	Thigh	Ankle
Vm and EEM	0.527**	0.617**	0.725**	0.521**	0.715**	0.643**	0.666**	0.562**
Acy and EEM	0.558**	0.624**	0.616**	0.469**	0.696**	0.668**	0.653**	0.483**
Acx and EEM	0.423**	0.573**	0.648**	0.482**	0.547**	0.495**	0.519**	0.516**
Acz and EEM	0.456**	0.544**	0.585**	0.493**	0.642**	0.517**	0.594**	0.537**

EE MET value prediction regression model

Equation	Equation model
1	EEm=-1.939+0.000407 ShoulderVM+0.000246 AnkleVM+0.074 Weight
2	METs=4.908+0.000377 ShoulderVM+0.000239 AnkleVM -0.0855 Age-0.025 Body fat rate

The difference between the Actigrap and the calibration value EEm

Match sample t test	X+SD	T	P
EEm	6.16±2.37	/	/
Wrist	20.42±11.36	34.871	0**
Elbow	11.28±5.96	30.436	0**
Shoulder	6.49±3.75	4.185	0**
Handle	23.17±12.59	37.193	0**
Thorax	4.98±3.08	-14.928	0**
Iliac crest	4.38±2.64	-24.306	0**
Thigh	4.61±2.87	-20.443	0**
Ankle	3.92±2.95	-22.285	0**

EE MET value prediction model summary (determinant coefficient)

Equation model	R	R2	Adjust R2
1	0.855**	0.723	0.722
2	0.836**	0.706	0.708

List of met measurements

GT3X wearing parts	Free singles		Phase integration
	GTSX	K4b2	GTSX	K4b2
Waist	6.4±1.3	9.4±1.2	6.3±1.5	9.2+1.5
Thigh	6.7±1.2		6.2±1.3
Ankle joint	8.5±1.2		8.3±1.6
Wrist	13.8±3.3		14.6±6.8
Handle	27.5±11.6		28.8±15.7

Matching t test analysis results

GT3X wearing parts	Phase integration		Free singles
	T	P	T	P
Waist	16.4	0	60.5	0
Thigh	10.4	0	44.2	0
Ankle joint	3.8	0	-5.8	0
Wrist	-21.2	0	-69.4	0
Handle	-29.3	0	-99.3	0